On a side note to MTG Holes, if the MTG Hole needs to be plated & does need to connect to a net like Chassis GND etc, if the part is NOT
ECO controlled the connection will not get from schematic/netlist to layout. I found this out after I made all holes NON-ECO so I would have to deal with them being removed, then I noticed none of the holes that should have been connected to GND were.